Engine-starter



`v. BENDlx.

ENGINE STARTER.

APPLICATION FILED OCT. l2, i916. 1,308,752, Patented July 8, 1919.

2 SHEETS-SHEET Il MM @f if/vf JCE/EW Mam; E WM-M47 JAA@ V. BENDIX.ENGINE STARTER.

APPLICATION man ocT 12. 1916.

1,308,752.. Pa1en1edJu1y-8,1919. l

2 SHEETS-SHEET 2.

ent No. 1,172,864, date VINCENT BENDIX, OF CHICAGO, ILLINOIS.

ENGINE-stramien.

Speccation of Letters Patent.

Patented July 8, 1919.

Application led October 12, 1916. Serial No. 125,291. i'

To all whom it may concern 13e it known that'I, VINCENT BENDIX, acltizen of the United States, residin at Chicago, in the county of Cookand tate of Illinois, have invented certain new and useful Improvementsin Engine-Starters,of which the following is a specification.

My'invention relates to that type of engine starter lexemplified inpatents heretofore issued to 4me, for instance Patent No. 1,125,935,dated Januar 26, 1915, andvlat.-

which starters are characterized' by al prime mover such as an electricmotor, and a transmission or drive for transrnltting the power of themotor by means of arotatablescrew shaft and a pinion mounted thereon,,to a inem-ber of the engine to be started, such as the fly wheelthereof. This drive comprisesa screw shaft operated either directly orin directly by the motor and the pinion screwthreaded on such shaft andhaving longitu'- dinal movement thereon and rotary movement therewith. 4

My .inventionV pertains to means for preventing creeping movement of thepinion on the screw shaft due to vibration of the aultomobile on whichmy engine starters arel commonly employed, such means being arranged to.prevent any .plossible slight rotation of the pinion whic might advanceit into contact with the fly wheel and thereby cause a clashing and a'rasping sound, such means being so designed as not to interfere in anyAmanner with the ordinary or normal operations of the drive.

In'the drawings, Figure 1 is an elevation of 4my drive; Fig. 2a crosssection on the line 2-2 ofFig. 1 looking in the direction of the arrows;Fig. 3 a view'similar to Fig. 1 ibut showing the' pinion in meshedposition and the spring extended ;-Fig. 4 a Vview similar to Fig. 1..butshowing a modified form of construction; and Fig. 5 a section on theline 5-5of Fig. 4.

The general construction of the drive is. the same as shown in my atentsaforesaid ,andftherefore it will be su cient to say that the samecomprises lin connection with the extended armature shaft La rotatablehollow screw shaft 2, pinion 3 adapted to mesh with thev teeth 4a of thefiy wheel 4 the coiled spring.' 5 constituting the "resilient February.22', 1916, i

' 41. In a drive of driving connection between the collar 6 se- -curedto the armature shaft by the pin 7 and the bolt 8 which screws into theenlargement 2 of the screw shaft.

c The means provided to prevent possibility of rotary movement of thepinion 3 on the'screw shaft due to vibration consists of tion andsurrounding the screw shaft between the pinion 3 and the enlargement or-a helical spring 9 ofrather light construc- 1 collar 'formation 2aofthe screw shaft.` This spring is anchored at onel end tothe pinion bymeans of the stud 10 and Vat the other end to the screw shaft by meansof the stud 11. The tension ofthis spring is such as to revent pinionmovement due to vibration ut not to prevent or afect inany manner of t epinion in its longitudinal movements with respect to the screw fshaftwhen going into and out of mesh with the fly wheel, at which time thespring is drawn out as seen in Fig. 3. It will be understood that anythe proper normal functions and operations movement of the pinion ineither direction on the screw shaft due to vibration will be resisted bythe coiled spring 9, the movement of thepinion in one direction tendingto coil such spring and in the other direction to.

uncoil the same. g

In Fi s. 4 and 5, Ihave shown a modified form o construction withrespect to the spring which is here in the form ofa coiled spring A12fastened at one end by thestud 13 to the pinion and at the other end bythe stud 14 to the collar 22 Theloperation and function of this form ofspring is the same as the spring 9.

I claim.:

the combination of a rotatable member, a driving member mounted thereonfor rotary movement therewith and longitudinal movement thereof, and ayielding connection fastened to saidl two members respectively.

the character described,

2. In a drive of the character described, I

the combination of'a rotatable member, a driving member mounted thereonfor rotary movement therewith and longitudinal moveoperating with saidtwo members;

3. In a drive of the character described,

'ment thereof, and at spring secured to and co-- the combination of arotatable member, a

drivingl member mounted thereon for rotary movement therewith andlongitudinal movey ment thereof, and a coiled spring around the.

rotatable member with one end anchored thereto and the other end to thedriving member.

4. In a device of thecharacter described,

the combination of a rotatable screw-shaft,

- a pinion screw-threaded thereon for rotary movement, therewith andlongitudinal move-y the combination of a rotatable screw-shaft,

a pinion screw-threaded thereon for rotary movement therewith andlongitudinal movement thereon, and a coiled spring .around the shaftwith one end connected thereto and` the other end to the pinion.

7. In a starting mechanism for internal combustion engines, a. drivingelement, a. driven element, means for automatically throwing saiddriving element into and out of driving relation with said drivenelement, and, a spring connected with said 'driving element to hold saiddriving element in inoperative relation with said driven element whensaid mechanism is at rest but ada/pted to permit said driving element tobe thrown into operative relation with said driven element when saidmechanism is operated.

8. In a starting. mechanism `for internal combustion engines, a drivingelement, a

driven element, a rotatable screw upon which said driving element isthreaded together with means for holding said driving element fromrotation thereon to cause it to be thrown into operative relation withsaid driven element when said screw is rotated,

` and yieldable means continuously acting on said driving element andtending to hold it in inoperative relation with said driven ele-4 ment.li

-9. In afstarting mechanisniforinternal combustion engines, a drivingelement, a drivenv element, a rotatable screw upon which said drivingelement is threaded together with means for holding said driving elementfrom rotation thereon to cause it to be thrown into operative relationvwith said driven element when said screw is rotated, and a springconnected with said driving element normally tending to hold the same ininoperative relation with said driven element when said mechanism is atrest but adapted to permit said driving element to be thrown Y intooperative rela-tion with said driven element when said mechanism isoperated.

10.In a starting mechanism for internal combustion engines, thecombination, with a starting motor shaft, of a screw loosely ountedthereon, a weighted pinion thread- .ed on said screw, rva driven gear,the arrangement and construction being such that said pinion ils causedto move along said screw and become meshed with'said gear when saidshaft is operated, and a spring connected with said pinion tending tohold the same from movement along said screw when the same is/ at restbut permitting the movement of said pinion on said screw when the sameis operated;`

11. In a starting mechanism for internal bombustion enginesythecombination, with a starting motor shaftg of ascrew loosely mounted onsaid'shaft, yieldable means for forming a driving connection betweensaid I shaft and a screw,a weighted pinion thread-- ed on said' screw, adriven gear, the arrangement and construction being such that saidpinion will be moved along said screw when the same is 'revolved by saidshaft to become meshed with said gear, and aspring connected with'saidpinion normally tending to hold the same from travel along said screwwhen said mechanism is at rest butpermitting. the same to travel alongsaid screw A when said mechanism is operated.

' VINCENT BENQIX.

